VulnerabilityAnalyzed
CVE-2021-30186
CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.
HIGH 7.5EPSS 7.74%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 7.74% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- wago/750-893 firmware · wago/750-891 firmware · wago/750-890 firmware · wago/750-889 firmware · wago/750-885 firmware · wago/750-882 firmware · wago/750-881 firmware · wago/750-880 firmware · wago/750-862 firmware · wago/750-852 firmware · wago/750-832 firmware · wago/750-831 firmware · wago/750-829 firmware · wago/750-8202 firmware · wago/750-8203 firmware · wago/750-8204 firmware · wago/750-8206 firmware · wago/750-8207 firmware · wago/750-8208 firmware · wago/750-8210 firmware · +9 more
- Source
- cve@mitre.org
EPSS 7.7% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://customers.codesys.com/index.phpPermissions Required, Vendor Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14725&token=08691519ef764b252630759eff925890176ecd78&download=Vendor Advisory
- https://customers.codesys.com/index.phpPermissions Required, Vendor Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14725&token=08691519ef764b252630759eff925890176ecd78&download=Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.